Pyrolysis of a hydrogenated coal liquid. [Yields of ethylene, propylene, butadiene, benzene, and other chemicals from steam-cracking]

Conference · Thu Jan 01 04:00:00 EST 1976 · Am. Chem. Soc., Div. Fuel Chem., Prepr.; (United States)

OSTI ID:7311859

Korosi, A; Woebcke, H N; Virk, P S

Experimental data are presented to show the yield of chemicals - ethylene, propylene, butadiene, and benzene, among others - available from pyrolysis of a hydrogenated coal liquid. The latter was derived by catalytic hydrogenation of the 250 to 380/sup 0/C fraction of a USBM 'Synthoil' product whereby the liquid hydrogen content was increased from 10.4 to 12.8 weight percent while about 85 percent of the polynuclear aromatic compounds originally present were converted to their alicyclic analogs. Pyrolysis experiments were conducted at commercial steam-cracking conditions, using a steam to hydrocarbon weight ratio of unity and an average residence time of 0.3 s in a tubular flow reactor with exit temperature and pressure, respectively, 870/sup 0/C and 2.0 bar. In addition to the hydrogenated coal liquid, two other feedstocks - a petroleum distillate, of similar boiling range and hydrogen content, and decahydronaphthalene, a model alicylic substrate - were pyrolyzed at similar conditions. Relative to the petroleum distillate, the hydrogenated coal liquid yielded somewhat less ethylene, about half the propylene, the same butadiene, and about twice the benzene. The yields of compounds with less than 8 carbon atoms obtained from the hydrogenated coal liquid bore a striking resemblance to the yields of these compounds obtained from decahydronaphthalene, implying similarity of the respective pyrolysis pathways.

• Research Organization: Stone and Webster Engineering Corp., Boston
• OSTI ID: 7311859
• Conference Information: Journal Name: Am. Chem. Soc., Div. Fuel Chem., Prepr.; (United States) Journal Volume: 21:6
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010406* -- Coal & Coal Products-- Pyrolysis & Cracking-- (-1987)
010500 -- Coal
Lignite
& Peat-- Products & By-Products
ACETYLENE
ALKANES
ALKENES
ALKYNES
ALLENE
AROMATICS
BENZENE
BUTADIENE
BUTENES
CATALYSIS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
COAL LIQUIDS
COMPARATIVE EVALUATIONS
CONDENSED AROMATICS
CRACKING
CRYOGENIC FLUIDS
DECOMPOSITION
DIENES
ELEMENTS
ENERGY SOURCES
ETHANE
ETHYLENE
FLUIDS
FOSSIL FUELS
FUELS
HYDROCARBONS
HYDROGEN
HYDROGENATION
METHANE
NONMETALS
ORGANIC COMPOUNDS
PETROLEUM
POLYENES
PROPYLENE
PYROLYSIS
STEAM
THERMAL CRACKING
THERMOCHEMICAL PROCESSES
TOLUENE
YIELDS